Mosquito season in Clark County, KY: when it starts and ends
Mosquito months in Clark County
In a normal year mosquito season in Clark County, KY starts around April 13 and ends around October 28, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Clark County, and when
- Start tipping out standing water weekly by March 30.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 28.
- 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to August, more so if over 60.
Clark County against the rest of KY
Clark County has the 111th longest season of 120 KY counties, at 198 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 54.3°F.
- Cumberland County: April 12 to October 27 (198 days, 0 WNV)
- Monroe County: April 12 to October 27 (198 days, 2 WNV)
- Montgomery County: April 13 to October 28 (198 days, 0 WNV)
- Lawrence County: April 12 to October 26 (197 days, 1 WNV)
West Nile in Clark County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Clark County (3 neuroinvasive) across 2 years. The worst was 2023 with 2; the latest was 2023.
More: how the dates are worked out · when the season starts across the US.